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Related Experiment Videos

Theophylline clearance during pregnancy.

B L Carter, C E Driscoll, G D Smith

    Obstetrics and Gynecology
    |October 1, 1986
    PubMed
    Summary

    Theophylline clearance decreases significantly during pregnancy, increasing toxicity risks for asthmatic patients. Frequent monitoring of theophylline serum levels is crucial during the last half of pregnancy.

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    Area of Science:

    • Pharmacology
    • Obstetrics
    • Pulmonology

    Background:

    • Theophylline is a common medication for managing asthma.
    • Pregnancy can alter drug metabolism and clearance.
    • Understanding theophylline pharmacokinetics during pregnancy is vital for patient safety.

    Purpose of the Study:

    • To prospectively evaluate theophylline clearance in pregnant asthmatic patients.
    • To compare theophylline clearance during pregnancy with postpartum levels.
    • To assess the clinical implications of altered theophylline clearance during gestation.

    Main Methods:

    • Prospective study design involving eight pregnant asthmatic patients.
    • Theophylline clearance measured at three points during pregnancy and once postpartum.
    • Serum theophylline levels monitored for toxicity and dosage adjustments.

    Main Results:

    • Theophylline clearance was significantly lower in the third trimester compared to postpartum.
    • Five of six patients showed a 20-53% reduction in theophylline clearance during pregnancy.
    • Two patients required dosage reductions due to theophylline toxicity symptoms.

    Conclusions:

    • Theophylline clearance is frequently reduced during the latter half of pregnancy.
    • Reduced clearance can lead to excessive serum theophylline levels and toxicity.
    • Increased frequency of theophylline serum level monitoring is recommended during late pregnancy.

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